A/C Auto Amp Power and Ground Diagnosis Procedure

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER


A/C Auto Amp Power and Ground Diagnosis Procedure

Regarding Wiring Diagram information, Electrical Diagrams.

DIAGNOSTIC PROCEDURE FOR A/C SYSTEM





SYMPTOM: A/C system does not come on.
1. CHECK POWER SUPPLY CIRCUITS FOR A/C AUTO AMP.





1. Turn ignition switch ON.
2. Check voltage between A/C auto amp. harness connector M49
(B) terminal 15 and M50 (A) terminal 27, and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Check 10A fuses [Nos. 8 and 19, located in the fuse block (J/B)]. Fuse Block - Junction Box (J/B).
- If fuses are OK, check harness for open circuit. Repair or replace as necessary.
- If fuses are NG, replace fuse and check harness for short circuit. Repair or replace as necessary.
2. CHECK GROUND CIRCUIT FOR A/C AUTO AMP.





1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connectors.
3. Check continuity between A/C auto amp. harness connector
M50 terminal 36 and ground.

36 - Ground : Continuity should exist.

Is the inspection result normal?
OK - Replace A/C auto amp. Service and Repair.
NG - Repair harness or connector.